Fitts’ Law: Modeling Movement Time in Human-Computer Interfaces

What is Fitts’ Law?

Applications of Fitts’ Law

Origins of Fitts’ Law: Information Theory

Information Theory, cont.

Fitts and Information Theory

Fitts and Information Theory, cont.

Building the Formula for Fitts’ Law

Building Fitts’ Law, cont.

Building Fitts’ Law, cont.

Fitts' Law

Physical Interpretation of Formula

Physical Interpretation, cont.

Other Formulations of Fitts’ Law

Graph of Welford's vs. Shannon's

Welford's vs. Shannon's

Fitts’ Original Experiments

Experiment Hypothesis

Experiment Design

Reciprocal Tapping

Results

Disk Transfer

Results

Pin Transfer

Results

Overall Analysis

Later Experiments

Experiment Design

Results

Comparison of Input Devices

Experimental Format

Comparison to Optimal Device

Conclusions

Comparison of Input Devices in Elemental Pointing and Dragging Tasks

Contributions

Mean Movement Times

Conclusions

Fitts’ Law in Two Dimensions with Hand and Head Movements

Trial Format

Problems

Adapting Fitts’ Law to Incorporate Hardware Noise

Conclusions

Extending Fitts’ Law to Two-Dimensional Tasks

Problems with 1D Model

Example

2D Solutions

W’ Model

“Smaller of” Model

Area Model

Sum Model

Model Comparison

Experiment Design

Results

Data Interpretation

Model Comparisons

Movement Time Prediction in Human Computer Interfaces

Speed-Accuracy Tradeoff

Normalized Fitts’ Law Model

Use of Fitts’ Law

Example

Fitts’ Models

Results

Future of Fitts’ Law

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